<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>P138 6.3.3 【案例】定时跳转</title>
</head>
<body>
    <div>
        <h2>提交成功</h2>
        <a href="http://www.example.com">
            <span id="seconds">3</span>秒后系统会自动跳转，也可单击此链接跳转
        </a>
    <script>
        function timing(secs,url){
            var seconds=document.getElementById('seconds');
            seconds.innerHTML=--secs;
            if(secs>0){
                setTimeout('timing('+secs+',\''+url+'\')',1000);
            }else{
                location.href=url;
            }
        };
        timing(3,'http://www.example.com');
    </script>
    
</body>
</html>